package com.lkd.interceptor;

import com.lkd.context.UserHolder;
import com.lkd.exception.BusinessException;
import com.lkd.properties.JwtProperties;
import com.lkd.utils.JwtUtil;
import io.jsonwebtoken.Claims;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
import org.springframework.web.method.HandlerMethod;
import org.springframework.web.servlet.HandlerInterceptor;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 * jwt令牌校验的拦截器
 */
@Component
@Slf4j
public class JwtTokenAdminInterceptor implements HandlerInterceptor {
    @Autowired
   private JwtProperties jwtProperties;

    /**
     * 校验jwt
     */
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        //判断当前拦截到的是Controller的方法还是其他资源
        if (!(handler instanceof HandlerMethod)) {
            //当前拦截到的不是动态方法，直接放行
            return true;
        }
        String authorization = request.getHeader("Authorization");
        System.out.println(authorization);
        System.out.println("====================================");
        System.out.println(authorization);
        if (authorization == null || authorization.isEmpty()) {
            throw new BusinessException("未登录");
        }
        Claims claims = null;
        try {
            claims = JwtUtil.parseJWT(jwtProperties.getAdminSecret(),authorization);
            System.out.println("==================================");
            System.out.println(claims);
            Integer id = (int)claims.get("id");
            System.out.println(id);
            UserHolder.set(Long.valueOf(id));
            log.info("用户id:{}",id);
        } catch (NumberFormatException e) {
            e.printStackTrace();
            throw new BusinessException("非法token");
        }
            if(!claims.get("role").equals("管理员")){
                throw new BusinessException("无权限");
            }
        System.out.println(request.getRequestURI());

        return true;
    }
}
